Home
Class 12
CHEMISTRY
The reaction 2NO + Br(2) to 2NOBr, obeys...

The reaction `2NO + Br_(2) to 2NOBr`, obeys the following mechanism:
`NO + Br_(2) overset("fast")(hArr) NOBr_(2), NOBr_(2) + NO overset("Slow")(to) 2NOBr` The rate expression of the above reaction can be written as

A

`r = k [NO]^(2) [Br_(2)]_(2)`

B

`r = k [NO][Br_(2)]`

C

`r = k [NO][Br_(2)]`

D

`r = k [NOBr_(2)]`

Text Solution

Verified by Experts

The correct Answer is:
A
For slowest step : rate `= k [NOBr_(2)][NO]` …(i)
For equilibrium also `K_(c ) = ([NOBr_(2)])/([NO][Nr_(2)])`
Rate `= k [NO]^(2) [Br_(2)]`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    NCERT FINGERTIPS|Exercise NCERT Exemplar|20 Videos

  • CHEMICAL KINETICS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • CHEMICAL KINETICS

    NCERT FINGERTIPS|Exercise Collision Theory Of Chemical Reactions|6 Videos

  • BIOMOLECULES

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

The rate and mechamical reaction are studied in chemical kinetics. The elementary reactions are single step reaction having no mechanism. The order of reaction and molecularity are same for elementary reactions. The rate of forward reaction aA + bBrarr cC+dD is given as: rate =((dx)/(dt))=-1/a(d[A])/(dt)=-1/b(d[B])/(dt)=1/c(d[C])/(dt)=1/d(d[D])/(dt) or expression can be written as : rate =K_(1)[A]^(a)[B]^(b)-K_(2)[C]^(c )[D]^(d) . At equilibrium, rate = 0 . The constants K, K_(1), K_(2) are rate constants of respective reaction. In case of reactions governed by two or more steps reaction mechanism, the rate is given by the slowest step of mechanism. For the reaction, 2NO+Br_(2) hArr 2NOBr , the mechanism is given in two steps: (1) NO+Br_(2) overset("fast")(hArr)NOBr_(2) (2) NOBr_(2)+NO overset("slow")(rarr)2NOBr The rate expression for the reaction is:

The reaction, 2NO+Br_(2)rarr 2NOBr , is supposed to follow the following mechanism, (i) NO+Br_(2) overset("fast")(hArr) NOBr_(2) (ii) NOBr_(2) +NO overset(slow)(rarr)2NOBr suggest the rate law expression.

For the reaction 2NO_(2)+F_(2)rarr 2NO_(2)F , following mechanism has been provided: NO_(2)+F_(2) overset("slow")(rarr) NO_(2)F+F NO_(2)+Foverset("fast")(rarr) NO_(2)F Thus rate expression of the above reaction can be writtens as:

Mechanism of the reaction 2NO + Cl_(2) rarr 2NOCl may be written as 2NO overset(k)(hArr) (NO)_(2) ……….(fast) (NO)_(2) + Cl_(2) overset(k)rarr 2NOCl ……….(slow) Rate equation would be

The mechanism of the reaction 2NO + O_(2) rarr 2NO_(2) is NO + NO underset(k_(-1))overset(k_(1))hArr N_(2)O_(2) ("fast") N_(2)O_(2) + O_(2) overset(k_(2))rarr 2NO_(2) (slow) The rate constant of the reaction is

For the reaction, 2NO+Cl_(2)rarr2NOCl the following mechanism has been proposed. NO+Cl_(2)hArr NOCl_(2)" " (fast) NOCl_(2)+NOrarr2NOCl" " (slow) The rate for the reaction is :